CVE-2011-4600

Publication date 31 December 2011

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The networkReloadIptablesRules function in network/bridge_driver.c in libvirt before 0.9.9 does not properly handle firewall rules on bridge networks when libvirtd is restarted, which might allow remote attackers to bypass intended access restrictions via a (1) DNS or (2) DHCP query.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libvirt	15.10 wily	Not affected
	15.04 vivid	Not affected
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Fixed 0.9.8-2ubuntu17.23

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libvirt	Upstream: http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=ae1232b298323dd7bef909426e2ebafa6bca9157

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.9 · Medium

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	High
Availability impact	None

Scores

Parameter	Value
Base score	5.9 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-2867-1
libvirt vulnerabilities
12 January 2016

Other references

https://www.cve.org/CVERecord?id=CVE-2011-4600